Versão online: http://www.lneg.pt/iedt/unidades/16/paginas/26/30/185 Comunicações Geológicas (2014) 101, Especial III, 1473-1476 IX CNG/2º CoGePLiP, Porto 2014 ISSN: 0873-948X; e-ISSN: 1647-581X Assessing the causes of the End-Triassic biotic crisis, a review Avaliando as causas da crise biótica fini-triássica, uma revisão N. Youbi1,2*, A. Marzoli3, H. Bertrand4, E. Font5, J. Dal Corso3, L. Martins2, J. Madeira5, J. Mata2, G. Bellieni3, S. Callegaro3, M. Kh. Bensalah1,2, M. Bahir1 Artigo Curto . Short Article © 2014 LNEG – Laboratório Nacional de Geologia e Energia IP Abstract: The end-Triassic biotic crisis marks one of the major mass 4Université Lyon 1 et Ecole Normale Supérieure de Lyon, Laboratoire de extinction events in the history of life. Several explanations for this Géologie de Lyon, UMR CNRS 5276, Lyon Cedex 7, France event have been suggested, but all present unanswered challenges: (i) 5Instituto Dom Luiz (LA), Universidade de Lisboa, Faculdade de Ciências, sea-level fluctuations during the Late Triassic, does not explain the Departamento de Geologia, Lisboa, Portugal. suddenness of the extinctions in the marine realm; (ii) no impact *Corresponding author / Autor correspondente:
[email protected] crater has been dated to coincide with the Triassic–Jurassic boundary (the impact responsible for the annular Manicouagan Reservoir occurred about 12 million years before the extinction event and the Rochechouart impact predates the Tr-J boundary by 1-2 Ma); (iii) 1. Introduction massive volcanic eruptions, specifically the flood basalts of the Central Atlantic Magmatic Province (CAMP), would have released The end-Triassic biotic crisis is one of the so called “big carbon dioxide or sulfur dioxide and aerosols, which would cause five” Phanerozoic mass extinctions (e.g., Raup & either intense global warming (from the former) or cooling (from the Sepkoski, 1982), when ca.